pub/ImplabNet: Implab/Promise.cs annotate

annotate Implab/Promise.cs @ 32:8eca2652d2ff

fixed: StackOverflow in IPromiseBase.Then(handler) fixed: hang in ChainMap method on empty arrays

author	cin
date	Tue, 08 Apr 2014 23:25:01 +0400
parents	2fad2d1f4b03
children	b255e4aeef17

rev	line source
2 aa367305156b small fixes cin parents: 1 diff changeset	1 using System;
aa367305156b small fixes cin parents: 1 diff changeset	2 using System.Collections.Generic;
aa367305156b small fixes cin parents: 1 diff changeset	3 using System.Reflection;
aa367305156b small fixes cin parents: 1 diff changeset	4 using System.Diagnostics;
aa367305156b small fixes cin parents: 1 diff changeset	5 using System.Threading;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	6 using Implab.Parallels;
2 aa367305156b small fixes cin parents: 1 diff changeset	7
aa367305156b small fixes cin parents: 1 diff changeset	8 namespace Implab {
aa367305156b small fixes cin parents: 1 diff changeset	9
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	10 public delegate void ErrorHandler(Exception e);
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	11 public delegate T ErrorHandler<out T>(Exception e);
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	12 public delegate void ResultHandler<in T>(T result);
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	13 public delegate TNew ResultMapper<in TSrc, out TNew>(TSrc result);
30 2fad2d1f4b03 small refactoring, cleanup. cin parents: 29 diff changeset	14 public delegate IPromise<TNew> ChainedOperation<in TSrc,TNew>(TSrc result);
2 aa367305156b small fixes cin parents: 1 diff changeset	15
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	16 /// <summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	17 /// Класс для асинхронного получения результатов. Так называемое "обещание".
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	18 /// </summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	19 /// <typeparam name="T">Тип получаемого результата</typeparam>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	20 /// <remarks>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	21 /// <para>Сервис при обращении к его методу дает обещаиние о выполнении операции,
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	22 /// клиент получив такое обещание может установить ряд обратных вызово для получения
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	23 /// событий выполнения обещания, тоесть завершения операции и предоставлении результатов.</para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	24 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	25 /// Обещение может быть как выполнено, так и выполнено с ошибкой. Для подписки на
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	26 /// данные события клиент должен использовать методы <c>Then</c>.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	27 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	28 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	29 /// Сервис, в свою очередь, по окончанию выполнения операции (возможно с ошибкой),
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	30 /// использует методы <c>Resolve</c> либо <c>Reject</c> для оповещения клиетна о
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	31 /// выполнении обещания.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	32 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	33 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	34 /// Если сервер успел выполнить обещание еще до того, как клиент на него подписался,
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	35 /// то в момент подписки клиента будут вызваны соответсвующие события в синхронном
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	36 /// режиме и клиент будет оповещен в любом случае. Иначе, обработчики добавляются в
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	37 /// список в порядке подписания и в этом же порядке они будут вызваны при выполнении
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	38 /// обещания.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	39 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	40 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	41 /// Обрабатывая результаты обещания можно преобразовывать результаты либо инициировать
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	42 /// связанные асинхронные операции, которые также возвращают обещания. Для этого следует
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	43 /// использовать соответствующую форму методе <c>Then</c>.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	44 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	45 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	46 /// Также хорошим правилом является то, что <c>Resolve</c> и <c>Reject</c> должен вызывать
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	47 /// только инициатор обещания иначе могут возникнуть противоречия.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	48 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	49 /// </remarks>
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	50 public class Promise<T> : IPromise<T> {
2 aa367305156b small fixes cin parents: 1 diff changeset	51
28 81708975d6f7 fixes cin parents: 27 diff changeset	52 protected struct HandlerDescriptor {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	53 public ResultHandler<T> resultHandler;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	54 public ErrorHandler errorHandler;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	55 public Action cancellHandler;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	56
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	57 public void Resolve(T result) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	58 if (resultHandler != null)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	59 try {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	60 resultHandler(result);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	61 } catch (Exception e) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	62 Reject(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	63 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	64 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	65
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	66 public void Reject(Exception err) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	67 if (errorHandler != null)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	68 try {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	69 errorHandler(err);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	70 } catch {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	71 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	72 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	73
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	74 public void Cancel() {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	75 if (cancellHandler != null)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	76 try {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	77 cancellHandler();
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	78 } catch {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	79 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	80 }
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	81 }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	82
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	83 const int UnresolvedSate = 0;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	84 const int TransitionalState = 1;
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	85 const int SucceededState = 2;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	86 const int RejectedState = 3;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	87 const int CancelledState = 4;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	88
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	89 readonly IPromiseBase m_parent;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	90 readonly bool m_cancellable;
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	91
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	92 int m_childrenCount = 0;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	93 int m_state;
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	94 T m_result;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	95 Exception m_error;
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	96
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	97 readonly MTQueue<HandlerDescriptor> m_handlers = new MTQueue<HandlerDescriptor>();
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	98
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	99 public Promise() {
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	100 m_cancellable = true;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	101 }
2 aa367305156b small fixes cin parents: 1 diff changeset	102
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	103 public Promise(IPromiseBase parent, bool cancellable) {
7 7ea9363fef6c inital progress handling cin parents: 6 diff changeset	104 m_cancellable = cancellable;
7ea9363fef6c inital progress handling cin parents: 6 diff changeset	105 m_parent = parent;
7ea9363fef6c inital progress handling cin parents: 6 diff changeset	106 }
7ea9363fef6c inital progress handling cin parents: 6 diff changeset	107
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	108 void InternalCancel() {
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	109 // don't try to cancel parent :)
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	110 Cancel(false);
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	111 }
2 aa367305156b small fixes cin parents: 1 diff changeset	112
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	113 bool BeginTransit() {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	114 return UnresolvedSate == Interlocked.CompareExchange(ref m_state, TransitionalState, UnresolvedSate);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	115 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	116
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	117 void CompleteTransit(int state) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	118 if (TransitionalState != Interlocked.CompareExchange(ref m_state, state, TransitionalState))
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	119 throw new InvalidOperationException("Can't complete transition when the object isn't in the transitional state");
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	120 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	121
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	122 void WaitTransition() {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	123 while (m_state == TransitionalState) {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	124 /* noop */
9bf5b23650c9 refactoring cin parents: 19 diff changeset	125 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	126 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	127
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	128 public bool IsResolved {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	129 get {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	130 return m_state > 1;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	131 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	132 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	133
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	134 public bool IsCancelled {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	135 get {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	136 return m_state == CancelledState;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	137 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	138 }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	139
29 768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	140 public Type PromiseType {
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	141 get { return typeof(T); }
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	142 }
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	143
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	144 /// <summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	145 /// Выполняет обещание, сообщая об успешном выполнении.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	146 /// </summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	147 /// <param name="result">Результат выполнения.</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	148 /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	149 public void Resolve(T result) {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	150 if (BeginTransit()) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	151 m_result = result;
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	152 CompleteTransit(SucceededState);
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	153 OnStateChanged();
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	154 } else {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	155 WaitTransition();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	156 if (m_state != CancelledState)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	157 throw new InvalidOperationException("The promise is already resolved");
9bf5b23650c9 refactoring cin parents: 19 diff changeset	158 }
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	159 }
2 aa367305156b small fixes cin parents: 1 diff changeset	160
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	161 /// <summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	162 /// Выполняет обещание, сообщая об ошибке
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	163 /// </summary>
16 5a4b735ba669 sync cin parents: 15 diff changeset	164 /// <remarks>
5a4b735ba669 sync cin parents: 15 diff changeset	165 /// Поскольку обещание должно работать в многопточной среде, при его выполнении сразу несколько потоков
5a4b735ba669 sync cin parents: 15 diff changeset	166 /// могу вернуть ошибку, при этом только первая будет использована в качестве результата, остальные
5a4b735ba669 sync cin parents: 15 diff changeset	167 /// будут проигнорированы.
5a4b735ba669 sync cin parents: 15 diff changeset	168 /// </remarks>
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	169 /// <param name="error">Исключение возникшее при выполнении операции</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	170 /// <exception cref="InvalidOperationException">Данное обещание уже выполнено</exception>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	171 public void Reject(Exception error) {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	172 if (BeginTransit()) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	173 m_error = error;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	174 CompleteTransit(RejectedState);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	175 OnStateChanged();
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	176 } else {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	177 WaitTransition();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	178 if (m_state == SucceededState)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	179 throw new InvalidOperationException("The promise is already resolved");
9bf5b23650c9 refactoring cin parents: 19 diff changeset	180 }
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	181 }
2 aa367305156b small fixes cin parents: 1 diff changeset	182
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	183 /// <summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	184 /// Отменяет операцию, если это возможно.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	185 /// </summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	186 /// <returns><c>true</c> Операция была отменена, обработчики не будут вызваны.<c>false</c> отмена не возможна, поскольку обещание уже выполнено и обработчики отработали.</returns>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	187 public bool Cancel() {
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	188 return Cancel(true);
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	189 }
2 aa367305156b small fixes cin parents: 1 diff changeset	190
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	191 /// <summary>
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	192 /// Adds new handlers to this promise.
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	193 /// </summary>
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	194 /// <param name="success">The handler of the successfully completed operation.
6ec82bf68c8e refactoring cin parents: 10 diff changeset	195 /// This handler will recieve an operation result as a parameter.</param>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	196 /// <param name="error">Handles an exception that may occur during the operation.</param>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	197 /// <returns>The new promise chained to this one.</returns>
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	198 public IPromise<T> Then(ResultHandler<T> success, ErrorHandler error) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	199 if (success == null && error == null)
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	200 return this;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	201
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	202 var medium = new Promise<T>(this, true);
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	203
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	204 ResultHandler<T> resultHandler;
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	205 if (success != null)
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	206 resultHandler = x => {
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	207 success(x);
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	208 medium.Resolve(x);
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	209 };
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	210 else
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	211 resultHandler = medium.Resolve;
2 aa367305156b small fixes cin parents: 1 diff changeset	212
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	213 ErrorHandler errorHandler;
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	214 if (error != null)
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	215 errorHandler = x => {
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	216 // несмотря на то, что обработчик ошибки вызывается безопасно,
9bf5b23650c9 refactoring cin parents: 19 diff changeset	217 // т.е. возникшие в нем ошибки будут подавлены, нам нужно
9bf5b23650c9 refactoring cin parents: 19 diff changeset	218 // гарантировать, что ошибка будет передана дальше по цепочке обещаний
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	219 try {
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	220 error(x);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	221 } catch { }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	222 medium.Reject(x);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	223 };
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	224 else
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	225 errorHandler = medium.Reject;
2 aa367305156b small fixes cin parents: 1 diff changeset	226
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	227 AddHandler(resultHandler, errorHandler, medium.InternalCancel);
2 aa367305156b small fixes cin parents: 1 diff changeset	228
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	229 return medium;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	230 }
2 aa367305156b small fixes cin parents: 1 diff changeset	231
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	232 public IPromiseBase Then(Action success,ErrorHandler error)
f0bf98e4d22c refactoring cin parents: 25 diff changeset	233 {
f0bf98e4d22c refactoring cin parents: 25 diff changeset	234 return Then(x => success(), error);
f0bf98e4d22c refactoring cin parents: 25 diff changeset	235 }
f0bf98e4d22c refactoring cin parents: 25 diff changeset	236
f0bf98e4d22c refactoring cin parents: 25 diff changeset	237 public IPromiseBase Then(Action success)
f0bf98e4d22c refactoring cin parents: 25 diff changeset	238 {
32 8eca2652d2ff fixed: StackOverflow in IPromiseBase.Then(handler) cin parents: 30 diff changeset	239 return Then(x => success());
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	240 }
f0bf98e4d22c refactoring cin parents: 25 diff changeset	241
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	242 /// <summary>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	243 /// Adds new handlers to this promise.
6ec82bf68c8e refactoring cin parents: 10 diff changeset	244 /// </summary>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	245 /// <param name="success">The handler of the successfully completed operation.
6ec82bf68c8e refactoring cin parents: 10 diff changeset	246 /// This handler will recieve an operation result as a parameter.</param>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	247 /// <param name="error">Handles an exception that may occur during the operation and returns the value which will be used as the result of the operation.</param>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	248 /// <returns>The new promise chained to this one.</returns>
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	249 public IPromise<T> Then(ResultHandler<T> success, ErrorHandler<T> error) {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	250 if (success == null && error == null)
6ec82bf68c8e refactoring cin parents: 10 diff changeset	251 return this;
6ec82bf68c8e refactoring cin parents: 10 diff changeset	252
6ec82bf68c8e refactoring cin parents: 10 diff changeset	253 var medium = new Promise<T>(this, true);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	254
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	255 ResultHandler<T> resultHandler;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	256 ErrorHandler errorHandler;
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	257
6ec82bf68c8e refactoring cin parents: 10 diff changeset	258 if (success != null)
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	259 resultHandler = x => {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	260 success(x);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	261 medium.Resolve(x);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	262 };
6ec82bf68c8e refactoring cin parents: 10 diff changeset	263 else
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	264 resultHandler = medium.Resolve;
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	265
6ec82bf68c8e refactoring cin parents: 10 diff changeset	266 if (error != null)
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	267 errorHandler = x => {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	268 try {
6ec82bf68c8e refactoring cin parents: 10 diff changeset	269 medium.Resolve(error(x));
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	270 } catch(Exception e) {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	271 medium.Reject(e);
9bf5b23650c9 refactoring cin parents: 19 diff changeset	272 }
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	273 };
6ec82bf68c8e refactoring cin parents: 10 diff changeset	274 else
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	275 errorHandler = medium.Reject;
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	276
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	277 AddHandler(resultHandler, errorHandler, medium.InternalCancel);
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	278
6ec82bf68c8e refactoring cin parents: 10 diff changeset	279 return medium;
6ec82bf68c8e refactoring cin parents: 10 diff changeset	280 }
6ec82bf68c8e refactoring cin parents: 10 diff changeset	281
6ec82bf68c8e refactoring cin parents: 10 diff changeset	282
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	283 public IPromise<T> Then(ResultHandler<T> success) {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	284 if (success == null)
6ec82bf68c8e refactoring cin parents: 10 diff changeset	285 return this;
6ec82bf68c8e refactoring cin parents: 10 diff changeset	286
6ec82bf68c8e refactoring cin parents: 10 diff changeset	287 var medium = new Promise<T>(this, true);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	288
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	289 ResultHandler<T> resultHandler;
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	290
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	291 if (success != null)
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	292 resultHandler = x => {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	293 success(x);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	294 medium.Resolve(x);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	295 };
6ec82bf68c8e refactoring cin parents: 10 diff changeset	296 else
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	297 resultHandler = medium.Resolve;
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	298
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	299 AddHandler(resultHandler, medium.Reject, medium.InternalCancel);
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	300
6ec82bf68c8e refactoring cin parents: 10 diff changeset	301 return medium;
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	302 }
2 aa367305156b small fixes cin parents: 1 diff changeset	303
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	304 public IPromise<T> Error(ErrorHandler error) {
f0bf98e4d22c refactoring cin parents: 25 diff changeset	305 return Then((ResultHandler<T>)null, error);
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	306 }
2 aa367305156b small fixes cin parents: 1 diff changeset	307
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	308 /// <summary>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	309 /// Handles error and allows to keep the promise.
6ec82bf68c8e refactoring cin parents: 10 diff changeset	310 /// </summary>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	311 /// <remarks>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	312 /// If the specified handler throws an exception, this exception will be used to reject the promise.
6ec82bf68c8e refactoring cin parents: 10 diff changeset	313 /// </remarks>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	314 /// <param name="handler">The error handler which returns the result of the promise.</param>
6ec82bf68c8e refactoring cin parents: 10 diff changeset	315 /// <returns>New promise.</returns>
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	316 public IPromise<T> Error(ErrorHandler<T> handler) {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	317 if (handler == null)
6ec82bf68c8e refactoring cin parents: 10 diff changeset	318 return this;
6ec82bf68c8e refactoring cin parents: 10 diff changeset	319
6ec82bf68c8e refactoring cin parents: 10 diff changeset	320 var medium = new Promise<T>(this, true);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	321
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	322 AddHandler(
27 a236cd1f0477 fixes cin parents: 26 diff changeset	323 x => medium.Resolve(x),
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	324 e => {
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	325 try {
6ec82bf68c8e refactoring cin parents: 10 diff changeset	326 medium.Resolve(handler(e));
6ec82bf68c8e refactoring cin parents: 10 diff changeset	327 } catch (Exception e2) {
6ec82bf68c8e refactoring cin parents: 10 diff changeset	328 medium.Reject(e2);
6ec82bf68c8e refactoring cin parents: 10 diff changeset	329 }
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	330 },
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	331 medium.InternalCancel
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	332 );
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	333
6ec82bf68c8e refactoring cin parents: 10 diff changeset	334 return medium;
6ec82bf68c8e refactoring cin parents: 10 diff changeset	335 }
6ec82bf68c8e refactoring cin parents: 10 diff changeset	336
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	337 public IPromise<T> Anyway(Action handler) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	338 if (handler == null)
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	339 return this;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	340
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	341 var medium = new Promise<T>();
2 aa367305156b small fixes cin parents: 1 diff changeset	342
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	343 AddHandler(
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	344 x => {
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	345 // to avoid handler being called multiple times we handle exception by ourselfs
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	346 try {
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	347 handler();
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	348 medium.Resolve(x);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	349 } catch (Exception e) {
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	350 medium.Reject(e);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	351 }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	352 },
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	353
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	354 e => {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	355 try {
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	356 handler();
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	357 } catch { }
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	358 medium.Reject(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	359 },
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	360
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	361 medium.InternalCancel
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	362 );
2 aa367305156b small fixes cin parents: 1 diff changeset	363
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	364 return medium;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	365 }
2 aa367305156b small fixes cin parents: 1 diff changeset	366
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	367 /// <summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	368 /// Позволяет преобразовать результат выполения операции к новому типу.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	369 /// </summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	370 /// <typeparam name="TNew">Новый тип результата.</typeparam>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	371 /// <param name="mapper">Преобразование результата к новому типу.</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	372 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	373 /// исключение возникшее при выполнении операции.</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	374 /// <returns>Новое обещание, которое будет выполнено при выполнении исходного обещания.</returns>
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	375 public IPromise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper, ErrorHandler error) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	376 if (mapper == null)
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	377 throw new ArgumentNullException("mapper");
2 aa367305156b small fixes cin parents: 1 diff changeset	378
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	379 // создаем прицепленное обещание
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	380 var chained = new Promise<TNew>();
2 aa367305156b small fixes cin parents: 1 diff changeset	381
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	382 ResultHandler<T> resultHandler = result => chained.Resolve(mapper(result));
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	383 ErrorHandler errorHandler = delegate(Exception e) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	384 if (error != null)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	385 try {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	386 error(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	387 } catch { }
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	388 // в случае ошибки нужно передать исключение дальше по цепочке
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	389 chained.Reject(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	390 };
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	391
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	392
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	393 AddHandler(
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	394 resultHandler,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	395 errorHandler,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	396 chained.InternalCancel
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	397 );
2 aa367305156b small fixes cin parents: 1 diff changeset	398
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	399 return chained;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	400 }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	401
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	402 public IPromise<TNew> Map<TNew>(ResultMapper<T, TNew> mapper) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	403 return Map(mapper, null);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	404 }
2 aa367305156b small fixes cin parents: 1 diff changeset	405
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	406 /// <summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	407 /// Сцепляет несколько аснхронных операций. Указанная асинхронная операция будет вызвана после
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	408 /// выполнения текущей, а результат текущей операции может быть использован для инициализации
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	409 /// новой операции.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	410 /// </summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	411 /// <typeparam name="TNew">Тип результата указанной асинхронной операции.</typeparam>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	412 /// <param name="chained">Асинхронная операция, которая должна будет начаться после выполнения текущей.</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	413 /// <param name="error">Обработчик ошибки. Данный обработчик получит
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	414 /// исключение возникшее при выполнении текуещй операции.</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	415 /// <returns>Новое обещание, которое будет выполнено по окончанию указанной аснхронной операции.</returns>
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	416 public IPromise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained, ErrorHandler error) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	417
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	418 // проблема в том, что на момент связывания еще не начата асинхронная операция, поэтому нужно
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	419 // создать посредника, к которому будут подвызяваться следующие обработчики.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	420 // когда будет выполнена реальная асинхронная операция, она обратиться к посреднику, чтобы
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	421 // передать через него результаты работы.
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	422 var medium = new Promise<TNew>(this, true);
2 aa367305156b small fixes cin parents: 1 diff changeset	423
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	424 ResultHandler<T> resultHandler = delegate(T result) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	425 if (medium.IsCancelled)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	426 return;
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	427
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	428 var promise = chained(result);
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	429
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	430 // notify chained operation that it's not needed
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	431 medium.Cancelled(() => promise.Cancel());
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	432 promise.Then(
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	433 x => medium.Resolve(x),
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	434 e => medium.Reject(e)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	435 );
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	436 };
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	437
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	438 ErrorHandler errorHandler = delegate(Exception e) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	439 if (error != null)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	440 error(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	441 // в случае ошибки нужно передать исключение дальше по цепочке
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	442 medium.Reject(e);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	443 };
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	444
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	445 AddHandler(
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	446 resultHandler,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	447 errorHandler,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	448 medium.InternalCancel
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	449 );
2 aa367305156b small fixes cin parents: 1 diff changeset	450
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	451 return medium;
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	452 }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	453
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	454 public IPromise<TNew> Chain<TNew>(ChainedOperation<T, TNew> chained) {
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	455 return Chain(chained, null);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	456 }
2 aa367305156b small fixes cin parents: 1 diff changeset	457
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	458 public IPromise<T> Cancelled(Action handler) {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	459 AddHandler(null, null, handler);
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	460 return this;
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	461 }
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	462
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	463 /// <summary>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	464 /// Adds the specified handler for all cases (success, error, cancel)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	465 /// </summary>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	466 /// <param name="handler">The handler that will be called anyway</param>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	467 /// <returns>self</returns>
26 f0bf98e4d22c refactoring cin parents: 25 diff changeset	468 public IPromise<T> Finally(Action handler) {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	469 if (handler == null)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	470 throw new ArgumentNullException("handler");
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	471 AddHandler(
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	472 x => handler(),
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	473 e => handler(),
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	474 handler
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	475 );
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	476 return this;
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	477 }
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	478
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	479 /// <summary>
29 768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	480 /// Преобразует результат обещания к нужному типу
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	481 /// </summary>
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	482 /// <typeparam name="T2"></typeparam>
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	483 /// <returns></returns>
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	484 public IPromise<T2> Cast<T2>() {
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	485 return Map(x => (T2)(object)x, null);
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	486 }
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	487
768f7deeb55b Added a casting method for promises. cin parents: 28 diff changeset	488 /// <summary>
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	489 /// Дожидается отложенного обещания и в случае успеха, возвращает
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	490 /// его, результат, в противном случае бросает исключение.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	491 /// </summary>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	492 /// <remarks>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	493 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	494 /// Если ожидание обещания было прервано по таймауту, это не значит,
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	495 /// что обещание было отменено или что-то в этом роде, это только
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	496 /// означает, что мы его не дождались, однако все зарегистрированные
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	497 /// обработчики, как были так остались и они будут вызваны, когда
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	498 /// обещание будет выполнено.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	499 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	500 /// <para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	501 /// Такое поведение вполне оправдано поскольку таймаут может истечь
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	502 /// в тот момент, когда началась обработка цепочки обработчиков, и
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	503 /// к тому же текущее обещание может стоять в цепочке обещаний и его
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	504 /// отклонение может привести к непрогнозируемому результату.
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	505 /// </para>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	506 /// </remarks>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	507 /// <param name="timeout">Время ожидания</param>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	508 /// <returns>Результат выполнения обещания</returns>
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	509 public T Join(int timeout) {
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	510 var evt = new ManualResetEvent(false);
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	511 Anyway(() => evt.Set());
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	512 Cancelled(() => evt.Set());
2 aa367305156b small fixes cin parents: 1 diff changeset	513
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	514 if (!evt.WaitOne(timeout, true))
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	515 throw new TimeoutException();
2 aa367305156b small fixes cin parents: 1 diff changeset	516
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	517 switch (m_state) {
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	518 case SucceededState:
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	519 return m_result;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	520 case CancelledState:
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	521 throw new OperationCanceledException();
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	522 case RejectedState:
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	523 throw new TargetInvocationException(m_error);
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	524 default:
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	525 throw new ApplicationException(String.Format("Invalid promise state {0}", m_state));
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	526 }
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	527 }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	528
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	529 public T Join() {
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	530 return Join(Timeout.Infinite);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	531 }
2 aa367305156b small fixes cin parents: 1 diff changeset	532
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	533 void AddHandler(ResultHandler<T> success, ErrorHandler error, Action cancel) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	534 Interlocked.Increment(ref m_childrenCount);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	535
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	536 HandlerDescriptor handler = new HandlerDescriptor {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	537 resultHandler = success,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	538 errorHandler = error,
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	539 cancellHandler = cancel
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	540 };
2 aa367305156b small fixes cin parents: 1 diff changeset	541
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	542 bool queued;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	543
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	544 if (!IsResolved) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	545 m_handlers.Enqueue(handler);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	546 queued = true;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	547 } else {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	548 // the promise is in resolved state, just invoke the handled with minimum overhead
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	549 queued = false;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	550 InvokeHandler(handler);
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	551 }
2 aa367305156b small fixes cin parents: 1 diff changeset	552
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	553 if (queued && IsResolved && m_handlers.TryDequeue(out handler))
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	554 // if the promise have been resolved while we was adding handler to the queue
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	555 // we can't guarantee that someone is still processing it
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	556 // therefore we will fetch a handler from the queue and execute it
27 a236cd1f0477 fixes cin parents: 26 diff changeset	557 // note that fetched handler may be not the one that we have added
a236cd1f0477 fixes cin parents: 26 diff changeset	558 // even we can fetch no handlers at all :)
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	559 InvokeHandler(handler);
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	560 }
2 aa367305156b small fixes cin parents: 1 diff changeset	561
27 a236cd1f0477 fixes cin parents: 26 diff changeset	562 protected virtual void InvokeHandler(HandlerDescriptor handler) {
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	563 switch (m_state) {
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	564 case SucceededState:
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	565 handler.Resolve(m_result);
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	566 break;
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	567 case RejectedState:
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	568 handler.Reject(m_error);
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	569 break;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	570 case CancelledState:
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	571 handler.Cancel();
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	572 break;
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	573 default:
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	574 // do nothing
aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	575 return;
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	576 }
dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	577 }
2 aa367305156b small fixes cin parents: 1 diff changeset	578
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	579 protected virtual void OnStateChanged() {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	580 HandlerDescriptor handler;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	581 while (m_handlers.TryDequeue(out handler))
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	582 InvokeHandler(handler);
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	583 }
6ec82bf68c8e refactoring cin parents: 10 diff changeset	584
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	585 public bool IsExclusive {
c82e0dfbb4dd sync cin parents: 7 diff changeset	586 get {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	587 return m_childrenCount <= 1;
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	588 }
c82e0dfbb4dd sync cin parents: 7 diff changeset	589 }
c82e0dfbb4dd sync cin parents: 7 diff changeset	590
11 6ec82bf68c8e refactoring cin parents: 10 diff changeset	591 protected bool Cancel(bool dependencies) {
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	592 if (BeginTransit()) {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	593 CompleteTransit(CancelledState);
10 aa33d0bb8c0c implemeted new cancellable promises concept cin parents: 9 diff changeset	594 OnStateChanged();
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	595
19 e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	596 if (dependencies && m_parent != null && m_parent.IsExclusive)
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	597 m_parent.Cancel();
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	598
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	599 return true;
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	600 } else {
e3935fdf59a2 Promise is rewritten to use interlocked operations instead of locks cin parents: 16 diff changeset	601 return false;
9 c82e0dfbb4dd sync cin parents: 7 diff changeset	602 }
c82e0dfbb4dd sync cin parents: 7 diff changeset	603 }
15 0f982f9b7d4d implemented parallel map and foreach for arrays cin parents: 14 diff changeset	604
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	605 /// <summary>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	606 /// Объединяет несколько обещаний в одно, результатом которого является массив результатов других обещаний.
9bf5b23650c9 refactoring cin parents: 19 diff changeset	607 /// Если хотябы одно из переданных обещаний не будет выполнено, то новое обещение тоже не будет выполнено.
9bf5b23650c9 refactoring cin parents: 19 diff changeset	608 /// При отмене нового обещания, переданные обещания также будут отменены, если никто больше на них не подписан.
9bf5b23650c9 refactoring cin parents: 19 diff changeset	609 /// </summary>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	610 /// <param name="promises">Список обещаний. Если список пустой, то результирующее обещание возвращается уже выполненным.</param>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	611 /// <returns>Обещание объединяющее в себе результат переданных обещаний.</returns>
9bf5b23650c9 refactoring cin parents: 19 diff changeset	612 /// <exception cref="ArgumentNullException"><paramref name="promises"/> не может быть null</exception>
30 2fad2d1f4b03 small refactoring, cleanup. cin parents: 29 diff changeset	613 public static IPromise<T[]> CreateComposite(IList<IPromise<T>> promises) {
25 9bf5b23650c9 refactoring cin parents: 19 diff changeset	614 if (promises == null)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	615 throw new ArgumentNullException();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	616
9bf5b23650c9 refactoring cin parents: 19 diff changeset	617 // создаем аккумулятор для результатов и результирующее обещание
9bf5b23650c9 refactoring cin parents: 19 diff changeset	618 var result = new T[promises.Count];
9bf5b23650c9 refactoring cin parents: 19 diff changeset	619 var promise = new Promise<T[]>();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	620
9bf5b23650c9 refactoring cin parents: 19 diff changeset	621 // special case
9bf5b23650c9 refactoring cin parents: 19 diff changeset	622 if (promises.Count == 0) {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	623 promise.Resolve(result);
9bf5b23650c9 refactoring cin parents: 19 diff changeset	624 return promise;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	625 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	626
9bf5b23650c9 refactoring cin parents: 19 diff changeset	627 int pending = promises.Count;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	628
9bf5b23650c9 refactoring cin parents: 19 diff changeset	629 for (int i = 0; i < promises.Count; i++) {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	630 var dest = i;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	631
9bf5b23650c9 refactoring cin parents: 19 diff changeset	632 promises[i].Then(
9bf5b23650c9 refactoring cin parents: 19 diff changeset	633 x => {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	634 result[dest] = x;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	635 if(Interlocked.Decrement(ref pending) == 0)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	636 promise.Resolve(result);
9bf5b23650c9 refactoring cin parents: 19 diff changeset	637 },
9bf5b23650c9 refactoring cin parents: 19 diff changeset	638 e => promise.Reject(e)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	639 );
9bf5b23650c9 refactoring cin parents: 19 diff changeset	640 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	641
9bf5b23650c9 refactoring cin parents: 19 diff changeset	642 promise.Cancelled(
9bf5b23650c9 refactoring cin parents: 19 diff changeset	643 () => {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	644 foreach(var d in promises)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	645 if(d.IsExclusive)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	646 d.Cancel();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	647 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	648 );
9bf5b23650c9 refactoring cin parents: 19 diff changeset	649
9bf5b23650c9 refactoring cin parents: 19 diff changeset	650 return promise;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	651 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	652
9bf5b23650c9 refactoring cin parents: 19 diff changeset	653 public static Promise<T> ResultToPromise(T result) {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	654 var p = new Promise<T>();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	655 p.Resolve(result);
9bf5b23650c9 refactoring cin parents: 19 diff changeset	656 return p;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	657 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	658
9bf5b23650c9 refactoring cin parents: 19 diff changeset	659 public static Promise<T> ExceptionToPromise(Exception error) {
9bf5b23650c9 refactoring cin parents: 19 diff changeset	660 if (error == null)
9bf5b23650c9 refactoring cin parents: 19 diff changeset	661 throw new ArgumentNullException();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	662
9bf5b23650c9 refactoring cin parents: 19 diff changeset	663 var p = new Promise<T>();
9bf5b23650c9 refactoring cin parents: 19 diff changeset	664 p.Reject(error);
9bf5b23650c9 refactoring cin parents: 19 diff changeset	665 return p;
9bf5b23650c9 refactoring cin parents: 19 diff changeset	666 }
9bf5b23650c9 refactoring cin parents: 19 diff changeset	667
6 dfa21d507bc5 refactoring: Promise.Then now returns a new chained promise cin* parents: 2 diff changeset	668 }
2 aa367305156b small fixes cin parents: 1 diff changeset	669 }

Mercurial > pub > ImplabNet

annotate Implab/Promise.cs @ 32:8eca2652d2ff